Ball-race extractor



June 1 ,1926. 1,587,153 E. E. HENDRICKSON BALL RACE EXTRACTOR Filed April 9, i925 construction shown in the accompan Patented June 1,1926.

E. HENDRICKBON, OI HOPKINQVILI-l, KENTUCKY.

- nan-men mnacron.

Application and April 9, ms. Serial 1 .21am.

This invention relates to ball race extractors and more particularly to a device for extracting the outer races of ball bearings from the mountings thereof.

'An important objectof the invention is to provides device of this character which will removethe race without marring the same, which may be readily and cheaply constructed and which will be durable and eflicient in service. a v

These and other objects I attain by the g drawings, wherein for the purpose of ustrat'ion is shown a preferred embodiment of my invention and wherein Figure 1 is a. vertical through a ball race extractor constructed in accordance with my invention-a plied to remove a ball race from the housing thereof;

Figure 2 is a view of the extractor removed, the outer shell being shown in section: a

Figure 3 is a top plan view :of the shell;

Figure 4 is a bottom plan view of the complete extractor: and

Figure 5 1s a top plan view of the inner element of the extractor.

Referring now more particularly to the drawings, the extractor comprises an outer shell 10 of a proper diameter for engagementwith the housing H of the -ball race.

This shell has a reduced interiorly screw-.

threaded hollow neck 11, the exterior face of which is provided with. flats 12 for engagement in a wrench or vise. Arranged within this shell and threaded into the neck thereof is an extractor or pulling plunger having a body portion threaded intermediate its "ends, as at 13, for coaction with the threads of the neck 11. At one end, the body portion is longitudinally slit, at diametrically opposed oints 14, to rovide a plurality of expansi In order that the expansion and conplished, the connection of these arms with the body is weakened by enlarging the slits 14 at the inner ends'thereof, as indicated at 16. These arms are each provided upon the outer face thereof with a circumferentially extending bead 17, the beads of the arms combining to form an annular flange which is of the same size as the vracegroove G of the race R which is to be removed.

The opposite end of the body is provided with wrench flats 18 for coaction with either sectional view race from its housin le or contractlble arms a- I wrench or vise as may be desired.

Through the body is formed a longitudinally extending bore 19, that ,portion of the bore lying between the arms 15 tapering and increasing indiameter toward the freeends of the arms, as more clearly shown at 20.

Directed through the bore 19 of the 'extractor is a shank 21 of thesame size as the bore having at one end a tapereden largement 22 corresponding to the taper at' 20 of-the bore 19 and having at its opposite end screw-threads 23 for coaction with a wing nut, 24. This shank is of greater length than'thebody so that the wing nut engaged with the threads thereofmay seat. upon the. end of the body of the extractor while the tapered portion may-be extended beyond the free ends of thearms .so that these arms may converge and reduce the external diametentherof, particularly at the bead 17.

In the use of the device, while these arms are converged, the extractor is pushed into the bore B of-the race until the beads 17 engage in the race groove G. then engaged and shifted until it seats against the housing of the bearing about the race. The wing nut .is then a plied and screwed home until the wedge as spread the arms 15' a desired distance and the extractor is no longer withdrawable from the race R. The outer shell 11 is then held against movement by a wrench or vise while the extractor is rotated. to withdraw the e housing may be of any character, it eing merely necessary that the shell 10 have a diameter slightly,

greater than the bearing and less than the external diameter of the housing and a depth eater than the de th of the race WhlCh 1s to be extracted fn the housing H is illustrated as thehousing provided upon the end bearings of smal motors.

Since the construction of the device is obviously capable of a considerable range of change and modification without materially departing fromv the spirit of my'invention. I do not limit myself to such spe .cific structure except as hereinafter claimed.

In an extractor for the outer races of ball bearings, a shell having an interiorly threaded .neck, an extractor threaded The shell 11 is the present instance,

throughjthe neck and formed at one end false with ahead for engagement in the ball tractor beingi longitudinally split to pro- 7 rate groove 'of the race to be extracted, said vide said arms, the inner ends of the splits 1O extractor having a longitudinal bore tabeing enlarged to add to the resiliency of pered at that end thereof lying betwen the the arms at the inner ends thereof.

5 arms with a taper increasing in size toward In testimony whereof I hereunto afiix my the ends of thearms, and a wedge shiftable signature. through the bore and engaging said taper for expanding the arms, the end of the ex- EDGAR E. HENDRICKSON. 

